Rabbi Eliezer ben Hyrcanus was dying. Around his bed stood his greatest student, Rabbi Akiva, and what Eliezer did with his final breath changed Jewish law forever.
He began teaching. In the narrow window before death he transmitted three hundred halakhic particulars governing the white spot covered with hair — the diagnostic sign of tzara'at, the spiritual affliction described in Leviticus 13. Three hundred distinctions on a single legal category, poured into one student in a few hours.
Two Arms Full of Torah
Then Eliezer lifted up his two arms and laid them across his chest. "Woe is me," he said, "because of these my two arms, these two scrolls of the law, that are about to depart from this world."
He looked at Akiva and continued: "If all the seas were ink, and all the reeds were quills, and every person a scribe, they could not record all I have learned and all I have taught, and all I have heard from the lips of Sages in the academies."
He was not boasting. He was mourning. Each arm, in his image, was a Sefer Torah — a living scroll of accumulated tradition — and when the arms stopped moving, two scrolls would close forever.
Then, almost as an afterthought, he added one more: "And I also taught three hundred laws based on the verse 'A witch shall not live'" (Exodus 22:17).
This Sanhedrin 68a passage is why Rabbi Akiva spent the rest of his life reconstructing and transmitting Torah with such urgency. He had seen what the loss of one teacher's arms could cost the world.